Emergency disposal system for waste liquid ammonia steel cylinder

Abstract

The utility model relates to an emergency disposal system for a waste liquid ammonia steel cylinder. The emergency disposal system comprises a steel cylinder punching unit, an ammonia gas absorption unit and a tail gas treatment unit, the steel cylinder punching unit comprises a nitrogen supply assembly, a steel cylinder treatment pool and a punching assembly used for drilling the waste liquid ammonia steel cylinder, and the waste liquid ammonia steel cylinder is immersed in the steel cylinder treatment pool and communicates with the nitrogen supply assembly through a pipeline; the ammonia gas absorption unit comprises an absorption cell filled with acidic absorption liquid, and the waste liquid ammonia steel cylinder is communicated with the absorption cell through a pipeline; the absorption tank is also respectively connected with an absorption liquid discharge pipeline and an absorption liquid supplement pipeline; the tail gas treatment unit comprises a spray tower and an incineration system communicated with an outlet of the spray tower, and the spray tower is communicated with the absorption tank through a tail gas discharge pipeline. Compared with the prior art, the emergency disposal system disclosed by the utility model has the advantages that the waste liquid ammonia steel cylinder can be perforated to release ammonia gas, and absorption liquid and released tail gas can be effectively treated.

Description

Technical Field

[0001] The utility model relates to the technical field of steel cylinder disposal, in particular to an emergency disposal system for waste liquid ammonia steel cylinders. Background Art

[0002] Liquid ammonia is a colorless liquid with a strong, pungent odor. It is classified as a Class 2.3 toxic gas, a hazardous chemical, and one of the key hazardous chemicals under regulatory oversight. Leaks of liquid ammonia release toxic gases, posing a threat to human health and the environment. Furthermore, liquid ammonia is extremely flammable and can form explosive mixtures with air. Exposure to open flames or high temperatures can cause combustion and explosion. Therefore, strict safety regulations and measures must be adhered to during storage and transportation to prevent accidents.

[0003] During storage and transportation, liquid ammonia is often stored in steel cylinders. Steel cylinders are a common type of gas pressure-bearing equipment. According to the "Regulations on Gas Cylinder Safety Supervision," cylinder inspection agencies must perform destructive treatment on discarded or unused liquefied gas cylinders, such as crushing or dismantling them, to ensure safety. However, for most discarded liquefied gas cylinders that have not leaked, discarded high-pressure cylinders often pose a higher potential risk due to their age and rusted and failed valves. Forcing the valves open at this point can create a serious risk of leakage.

[0004] Therefore, it is necessary to develop a new emergency disposal system for discarded liquid ammonia cylinders to release and safely dispose of the ammonia gas in the discarded liquid ammonia cylinders. Utility Model Content

[0005] The purpose of the utility model is to provide an emergency disposal system for waste liquid ammonia cylinders to release and safely dispose of ammonia gas in the waste liquid ammonia cylinders.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] An emergency disposal system for waste liquid ammonia cylinders, comprising a cylinder perforating unit, an ammonia absorption unit and an exhaust gas treatment unit;

[0008] The cylinder drilling unit includes a nitrogen gas supply assembly, a cylinder processing pool, and a drilling assembly for drilling holes in waste liquid ammonia cylinders. The waste liquid ammonia cylinders are immersed in the cylinder processing pool and connected to the nitrogen gas supply assembly through a pipeline.

[0009] The ammonia absorption unit includes an absorption tank filled with acidic absorption liquid, and the waste liquid ammonia cylinder is connected to the absorption tank through a pipeline; the absorption tank is also connected to an absorption liquid discharge pipeline and an absorption liquid replenishment pipeline respectively;

[0010] The tail gas treatment unit includes a spray tower and an incineration system connected to the outlet of the spray tower. The spray tower is connected to the absorption tank through a tail gas discharge pipeline.

[0011] Furthermore, a first spray assembly is provided above the cylinder treatment pool, which can be used to inject water into the cylinder treatment pool and absorb leaked ammonia.

[0012] Furthermore, a gas detection component and a monitoring component are installed on the cylinder processing pool.

[0013] Furthermore, the values ​​of each instrument of the gas detection component are all within the monitoring field of view of the monitoring component.

[0014] Furthermore, the nitrogen gas supply assembly is connected to the waste liquid ammonia cylinder through an air intake pipe.

[0015] Furthermore, the waste liquid ammonia cylinder is connected to the absorption tank through an exhaust pipe, and the end of the exhaust pipe extends into the absorption tank and is immersed in the absorption liquid.

[0016] Furthermore, the exhaust pipe is inclined and extends into the absorption liquid, and the end of the exhaust pipe is preferably 1 / 5 away from the bottom of the absorption tank.

[0017] Furthermore, the air intake pipe and the exhaust pipe are respectively provided with a first valve and a second valve for controlling the gas delivery conditions of the air intake pipe and the exhaust pipe.

[0018] Furthermore, the air intake duct and the exhaust duct are both communicated with a vertically arranged perforated channel.

[0019] Furthermore, the punching assembly can extend into the punching channel to drill holes in the discarded liquid ammonia cylinder, and the gas released after drilling can pass through the punching channel and be output from the exhaust channel to the absorption tank.

[0020] Furthermore, the ammonia absorption unit also includes an online pH meter that can be inserted into the absorption liquid to monitor pH. The absorption status of the absorption liquid can be judged by the pH value displayed by the online pH meter.

[0021] Furthermore, a negative pressure pump is provided on the absorption liquid discharge pipeline for discharging the absorption liquid that has absorbed ammonia in the absorption tank through the absorption liquid discharge pipeline for subsequent renewal of the absorption liquid.

[0022] Furthermore, a circulation pump is provided on the absorption liquid replenishing pipeline for inputting clean absorption liquid into the absorption tank.

[0023] Furthermore, the absorption liquid replenishing pipeline is connected to the tail gas emission pipeline, and the end of the absorption liquid replenishing pipeline is provided with a second spraying assembly located in the tail gas emission pipeline, which is used to transport the clean absorption liquid into the absorption tank by spraying.

[0024] Furthermore, a fan is provided on the tail gas discharge pipeline for conveying the tail gas generated in the absorption tank to the spray tower.

[0025] Furthermore, a third spray assembly is provided in the spray tower, which supplies water through a circulating pump and adsorbs the tail gas.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The waste liquid ammonia cylinder emergency disposal system of the present invention punches holes in the waste liquid ammonia cylinders through the cylinder punching unit and outputs ammonia gas. The output ammonia gas can be absorbed in the ammonia absorption unit, and the tail gas after absorption can also be post-processed through the tail gas treatment unit. The cooperation of the three units realizes the emergency disposal of the waste liquid ammonia cylinders.

[0028] (2) In order to protect the safety of operators, the cylinder punching unit of the present invention can flexibly set a remote monitoring component on the cylinder processing pool, and the cylinder processing pool and the gas detection component can be remotely monitored through the monitoring component.

[0029] (3) The waste liquid ammonia cylinder of the present invention can fully introduce ammonia into the absorption tank under the input of nitrogen, and detect the absorption status of ammonia in the absorption tank with the assistance of a gas detection component and an online pH meter.

[0030] (4) The ammonia absorption unit of the present invention can discharge and replenish the absorption liquid in a timely manner through the cooperation of the absorption liquid discharge pipe and the absorption liquid replenishment pipe.

[0031] (5) The absorption liquid replenishing pipeline of the utility model can be connected to the tail gas emission pipeline, and the clean absorption liquid can be transported to the absorption tank by spraying, which can greatly reduce the leakage of volatile gases in the absorption liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the emergency disposal system for waste liquid ammonia cylinders according to Example 1 of the present utility model.

[0033] Figure 2 This is a schematic diagram of the emergency disposal system for waste liquid ammonia cylinders according to Example 2 of the present utility model.

[0034] Figure 3 This is a structural diagram of the punching component of Example 3 of the present utility model.

[0035] Description of the marks in the figure:

[0036] 1-steel cylinder punching unit, 11-nitrogen gas supply assembly, 12-steel cylinder treatment pool, 13-punching assembly, 14-first spray assembly, 15-gas detection assembly, 16-monitoring assembly, 17-inlet pipe, 171-first valve, 18-exhaust pipe, 181-second valve, 19-punching channel;

[0037] 2- ammonia absorption unit, 21- absorption tank, 22- absorption liquid discharge pipeline, 23- absorption liquid replenishing pipeline, 24- online pH meter, 25- negative pressure pump, 26- circulation pump, 27- second spray assembly;

[0038] 3- tail gas treatment unit, 31- spray tower, 32- incineration system, 33- tail gas discharge pipe, 34- fan, 35- third spray assembly;

[0039] 4-Discarded liquid ammonia cylinders. DETAILED DESCRIPTION

[0040] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0041] In the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance; in addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0043] Example 1:

[0044] An emergency disposal system for waste liquid ammonia cylinders, such as Figure 1 As shown, it includes a cylinder punching unit 1, an ammonia absorption unit 2 and an exhaust gas treatment unit 3.

[0045] The cylinder drilling unit 1 includes a nitrogen supply assembly 11, a cylinder treatment tank 12, and a drilling assembly 13 for drilling holes in the waste liquid ammonia cylinder 4. The waste liquid ammonia cylinder 4 is immersed in the cylinder treatment tank 12 and connected to the nitrogen supply assembly 11 via a pipeline.

[0046] The ammonia absorption unit 2 includes an absorption tank 21 filled with acidic absorption liquid. The waste liquid ammonia cylinder 4 is connected to the absorption tank 21 via a pipeline. The absorption tank 21 is also connected to an absorption liquid discharge pipeline 22 and an absorption liquid replenishment pipeline 23, which are used to discharge the absorption liquid after absorbing ammonia and replenish it with new clean absorption liquid.

[0047] The tail gas treatment unit 3 includes a spray tower 31 and an incineration system 32 connected to the outlet of the spray tower 31. The spray tower 31 is connected to the absorption tank 21 through an exhaust gas discharge pipe 33. The exhaust gas escaping from the absorption tank 21 is input into the spray tower 31 through the exhaust gas discharge pipe 33, and then input into the incineration system 32 for incineration.

[0048] In this embodiment, the waste liquid ammonia cylinder 4 is installed in the cylinder treatment pool 12, and water is injected into the cylinder treatment pool 12 and then sealed. Subsequently, the waste liquid ammonia cylinder 4 is drilled through the drilling component 13, and the ammonia gas in the waste liquid ammonia cylinder 4 is introduced into the absorption tank 21 through a pipeline, and nitrogen is input through the nitrogen supply component 11 to input the gas in the waste liquid ammonia cylinder 4 into the absorption tank 21 as much as possible. The exhaust gas escaping and leaking in the absorption tank 21 can be input into the spray tower 31 through the exhaust gas discharge pipeline 33, and after spraying, it can be input into the incineration system 32 for incineration. The absorption liquid in the absorption tank 21 can be discharged and replenished in a timely manner through the absorption liquid discharge pipeline 22 and the absorption liquid replenishment pipeline 23.

[0049] Example 2:

[0050] A system for emergency disposal of discarded liquid ammonia cylinders includes a cylinder perforating unit 1, an ammonia absorption unit 2, and an exhaust gas treatment unit 3. The system differs from Example 1 in that a first spray assembly 14 is provided above the cylinder treatment pool 12 in this embodiment, which can be used to fill the cylinder treatment pool with water and absorb leaked ammonia.

[0051] In addition, if Figure 2As shown, the cylinder treatment pool 12 is also equipped with a gas detection component 15 and a monitoring component 16. The monitoring component 16 can be equipped with a conventional high-definition camera with a remote monitoring function. The instrument values ​​of the gas detection component 12 are all within the monitoring field of view of the monitoring component 16. The gas detection component 15 of this embodiment is an ammonia detector that can monitor the gas concentration of leaked ammonia. In addition, since ammonia is prone to leakage during the disposal process of the discarded liquid ammonia cylinder 4, in order to protect the safety of the operator, the gas detection component 15 and the cylinder treatment pool 12 can be remotely monitored by the monitoring component 16.

[0052] Example 3:

[0053] A system for emergency disposal of discarded liquid ammonia cylinders includes a cylinder perforation unit 1, an ammonia absorption unit 2, and an exhaust gas treatment unit 3. The cylinder perforation unit 1 includes a nitrogen supply assembly 11, a cylinder treatment tank 12, and a perforation assembly 13 for drilling holes in discarded liquid ammonia cylinders 4. The discarded liquid ammonia cylinders 4 are immersed in the cylinder treatment tank 12 and connected to the nitrogen supply assembly 11 via a pipeline.

[0054] Specifically, the waste liquid ammonia cylinder 4 of this embodiment is installed on the support frame in the cylinder treatment tank 12 by means of a clamp sleeved on the outside of the waste liquid ammonia cylinder 4, so that the waste liquid ammonia cylinder 4 is firmly installed and fixed. The nitrogen supply assembly 11 of this embodiment is connected to the waste liquid ammonia cylinder 4 through the air intake pipe 17. The waste liquid ammonia cylinder 4 is connected to the absorption tank 21 through the exhaust pipe 18. The end of the exhaust pipe 18 is tilted and extends into the absorption tank 21 and is immersed in the absorption liquid, and the end of the exhaust pipe is preferably 1 / 5 away from the bottom of the absorption tank. A first valve 171 and a second valve 181 are respectively provided on the air intake pipe 17 and the exhaust pipe 18 to control the gas delivery conditions of the air intake pipe 17 and the exhaust pipe 18. Conventional needle valves can be used for the first valve 171 and the second valve 181 of this embodiment.

[0055] like Figure 3 As shown, the air intake pipe 17 and the exhaust pipe 18 of this embodiment are both connected to a vertically arranged perforated channel 19. The drilling assembly 13 can be extended into the perforated channel 19 to drill a hole in the waste liquid ammonia cylinder 4. The drilling assembly 13 of this embodiment can be a bench drill. Nitrogen output from the nitrogen supply assembly 11 can be fed into the perforated channel 19 through the air intake pipe 17 and then into the waste liquid ammonia cylinder 4. After drilling, the gas released from the waste liquid ammonia cylinder 4 can be output from the exhaust pipe 18 to the absorption tank 21 through the perforated channel 19 under the control of the second valve 181.

[0056] To ensure the liquid sealing properties, mechanical and water injection submerged pressure punching methods can be used. The specific steps are as follows: (1) Select a suitable punching machine based on the pipe diameter, wall thickness, pressure level and other parameters to be punched; (2) To ensure the safety of the project, a pressure test is carried out before construction to verify the pressure sealing performance of various components such as the punching machine and valves. Connect the pressure gauge with nitrogen, and the test is qualified if the pressure is within 1MPa and there is no leakage. (3) Strictly control the operating procedures, punch the hole, start the punching machine mechanism, rotate the tool (i.e., punching component 13) and run it up and down along the punching channel 19 to achieve cutting. After cutting is completed, lift the tool.

[0057] Example 4:

[0058] A system for emergency disposal of discarded liquid ammonia cylinders includes a cylinder perforation unit 1, an ammonia absorption unit 2, and an exhaust gas treatment unit 3. The ammonia absorption unit 2 includes an absorption tank 21 filled with acidic absorption liquid. Discarded liquid ammonia cylinders 4 are connected to the absorption tank 21 via a pipeline. The absorption tank 21 is also connected to an absorption liquid discharge pipeline 22 and an absorption liquid replenishment pipeline 23, respectively, for discharging the absorption liquid after absorbing ammonia and replenishing it with new, clean absorption liquid.

[0059] The difference from Example 1 is that the ammonia absorption unit 2 of this embodiment also includes an online pH meter 24 that can be inserted into the absorption liquid to monitor pH. The continuously changing pH value of the online pH meter is used to determine the absorption status of the absorption liquid in the absorption tank 21. The absorption liquid in this embodiment is a 5% hydrochloric acid solution that reacts with ammonia to form ammonium chloride. When the value of the online pH meter 24 gradually approaches neutral and no longer fluctuates, it indicates that the gas in the waste liquid ammonia cylinder 4 has been substantially completely discharged.

[0060] Example 5:

[0061] A system for emergency disposal of discarded liquid ammonia cylinders includes a cylinder perforation unit 1, an ammonia absorption unit 2, and an exhaust gas treatment unit 3. The ammonia absorption unit 2 includes an absorption tank 21 filled with acidic absorption liquid. Discarded liquid ammonia cylinders 4 are connected to the absorption tank 21 via a pipeline. The absorption tank 21 is also connected to an absorption liquid discharge pipeline 22 and an absorption liquid replenishment pipeline 23, respectively, for discharging the absorption liquid after absorbing ammonia and replenishing it with clean absorption liquid.

[0062] Specifically, the absorption liquid discharge pipe 22 of this embodiment is provided with a negative pressure pump 25, which can discharge the absorption liquid in the absorption tank 21. The absorption liquid replenishment pipe 23 is provided with a circulation pump 26 for inputting clean absorption liquid into the absorption tank 21. In this embodiment, the absorption liquid replenishment pipe 23 is connected to the exhaust gas discharge pipe 33, and the end of the absorption liquid replenishment pipe 23 is provided with a second spray assembly 27 located within the exhaust gas discharge pipe 33. Clean absorption liquid is delivered to the absorption tank 21 by spraying, and the leakage of volatile gases in the absorption liquid can be greatly reduced through the sealed exhaust gas discharge pipe 33.

[0063] Example 6:

[0064] An emergency disposal system for discarded liquid ammonia cylinders includes a cylinder perforation unit 1, an ammonia absorption unit 2, and an exhaust gas treatment unit 3. The exhaust gas treatment unit 3 includes a spray tower 31 and an incineration system 32 connected to the outlet of the spray tower 31. The spray tower 31 is connected to the absorption tank 21 via an exhaust gas discharge pipe 33. Exhaust gas escaping from the absorption tank 21 is fed into the spray tower 31 through the exhaust gas discharge pipe 33, and then fed into the incineration system 32 for incineration.

[0065] Ammonia reacts with hydrochloric acid to produce ammonium chloride. After NH3 is introduced, the chemical equation for the reaction between NH3 and HCl is: NH3 + HCl = NH4Cl. Small solid particles of ammonium chloride are produced in the absorption cell 9, generating a large amount of white smoke. At this point, if the molar ratio of NH3 to HCl is 1:1, the acid and base are perfectly neutralized, reaching a pH of 7, accompanied by the generation of a large amount of white smoke. If the molar ratio of NH3 to HCl is greater than 1:1, the NH3 will have completely reacted with all the HCl, leaving NH3 and H2O in the absorption cell. The NH3 and H2O reaction then proceeds: NH3 + H2O = NH3·H2O, producing NH3·H2O.

[0066] In this embodiment, a fan 34 is provided on the exhaust gas discharge pipe 33 to transport the exhaust gas generated in the absorption tank 21 to the spray tower 31. The spray tower 31 is provided with a third spray assembly 35, which absorbs the exhaust gas through water spray supplied by a circulating pump. The remaining exhaust gas is then fed into the incineration system 32 for incineration.

[0067] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. An emergency disposal system for waste liquid ammonia cylinders, characterized in that: It comprises a steel cylinder punching unit (1), an ammonia absorption unit (2) and an exhaust gas treatment unit (3); The cylinder drilling unit (1) comprises a nitrogen gas supply assembly (11), a cylinder treatment pool (12), and a drilling assembly (13) for drilling holes in the waste liquid ammonia cylinder (4); the waste liquid ammonia cylinder (4) is immersed in the cylinder treatment pool (12) and communicated with the nitrogen gas supply assembly (11) through a pipeline; The ammonia absorption unit (2) includes an absorption tank (21) filled with acidic absorption liquid, and the waste liquid ammonia cylinder (4) is connected to the absorption tank (21) through a pipeline; the absorption tank (21) is also connected to an absorption liquid discharge pipeline (22) and an absorption liquid replenishment pipeline (23). The tail gas treatment unit (3) comprises a spray tower (31) and an incineration system (32) connected to the outlet of the spray tower (31); the spray tower (31) is connected to the absorption tank (21) via a tail gas discharge pipe (33).

2. The emergency disposal system for waste liquid ammonia cylinders according to claim 1 is characterized in that: A first spray assembly (14) is provided above the cylinder treatment pool (12).

3. The emergency disposal system for waste liquid ammonia cylinders according to claim 1 is characterized in that: A gas detection component (15) and a monitoring component (16) are installed on the cylinder processing pool (12).

4. The emergency disposal system for waste liquid ammonia cylinders according to claim 1, characterized in that: The nitrogen gas supply assembly (11) is connected to the waste liquid ammonia cylinder (4) through an air inlet pipe (17); The waste liquid ammonia cylinder (4) is connected to the absorption tank (21) through an exhaust pipe (18), and the end of the exhaust pipe (18) extends into the absorption tank (21) and is immersed in the absorption liquid.

5. The emergency disposal system for waste liquid ammonia cylinders according to claim 4 is characterized in that: The air intake pipe (17) and the air exhaust pipe (18) are respectively provided with a first valve (171) and a second valve (181).

6. The emergency disposal system for waste liquid ammonia cylinders according to claim 4, characterized in that: The air inlet pipe (17) and the air outlet pipe (18) are both connected to a vertically arranged punching channel (19), and the punching assembly (13) can extend into the punching channel (19) to drill holes in the waste liquid ammonia cylinder (4).

7. The emergency disposal system for waste liquid ammonia cylinders according to claim 1, characterized in that: The ammonia absorption unit (2) further comprises an online pH meter (24) capable of extending into the absorption liquid for pH monitoring.

8. The waste liquid ammonia cylinder emergency disposal system according to claim 1, characterized in that: The absorption liquid discharge pipe (22) is provided with a negative pressure pump (25), and the absorption liquid replenishment pipe (23) is provided with a circulation pump (26).

9. The waste liquid ammonia cylinder emergency disposal system according to claim 1, characterized in that: The absorption liquid replenishing pipeline (23) is in communication with the tail gas discharge pipeline (33), and a second spraying assembly (27) located in the tail gas discharge pipeline (33) is provided at the end of the absorption liquid replenishing pipeline (23).

10. The waste liquid ammonia cylinder emergency disposal system according to claim 1, characterized in that: The exhaust gas discharge pipe (33) is provided with a fan (34); A third spray assembly (35) is provided in the spray tower (31).

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